/**
*
* @see PublicKey::fromPEM()
* @param PEM $pem
* @throws \UnexpectedValueException
* @return self
*/
public static function fromPEM(PEM $pem)
{
if ($pem->type() == PEM::TYPE_RSA_PUBLIC_KEY) {
return self::fromDER($pem->data());
}
if ($pem->type() != PEM::TYPE_PUBLIC_KEY) {
throw new \UnexpectedValueException("Invalid PEM type.");
}
$pki = PublicKeyInfo::fromDER($pem->data());
if ($pki->algorithmIdentifier()->oid() != AlgorithmIdentifier::OID_RSA_ENCRYPTION) {
throw new \UnexpectedValueException("Not an RSA public key.");
}
return self::fromDER($pki->publicKeyData());
}
/**
*
* @see PublicKey::fromPEM()
* @param PEM $pem
* @throws \UnexpectedValueException
* @return self
*/
public static function fromPEM(PEM $pem)
{
if ($pem->type() != PEM::TYPE_PUBLIC_KEY) {
throw new \UnexpectedValueException("Not a public key.");
}
$pki = PublicKeyInfo::fromDER($pem->data());
$algo = $pki->algorithmIdentifier();
if ($algo->oid() != AlgorithmIdentifier::OID_EC_PUBLIC_KEY) {
throw new \UnexpectedValueException("Not an elliptic curve key.");
}
// ECPoint is directly mapped into public key data
return new self($pki->publicKeyData(), $algo->namedCurve());
}
